Improvement in cultivators



N. s. SHIELDS.

Cultivator.

t a P 2 3 vekziaz MPETERS. F'HDTG-LITHOGHAFHER. WASHINGTONv D C UNITEDSTATES PATENT OFFICE.

NELSON S. SHIELDS, OF ROCKFORD, ILLINOIS.

IMPROVEMENT IN CULTIVATO RS.

Specification forming part of Letters Patent N0. 106,733, dated August23, 11570.

To all whom 'it may concern:

Be it known that I, NELsoN S. SHIELDS, of Rockford, in the county of Winuebago and State of Illinois, have invented a new andusefullmprovementin Cultivators; and I do hereby declare that thefollowing is a full and exact description of the same, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon.

This invention consists in the employment of springs in connection withthe evener and shovel-beams of a cultivator, as will be fully describedhereinafter.

In the drawings, Figure 1 represents a top view of my improvedcultivator, and Fig. 2 a side elevation.

To enable others skilled in the art to make and use my invention, I willnow proceed to describe fullyits construction and method of operation.

A A represent the shovel-beams of a cultivator, to which are attachedthe shovel-stand ards in any proper manner.

B B represent springs, preferably of steel, which are secured at theirrear ends to the beams A A, and united at their front ends by means of across bar, b, as shown. The attachment at the front, however, is not arigid one, the parts being united by means of bolts passing throughslotted openings, by which means'either spring is permitted 'to vibrateto a certain extent without affecting the other.

0 represents the evener, which is pivoted to the cross-bar I), as shown.

The operation is as follows: When the cultivator is not at work thesprings are not depressed and the draft remains unchanged. When,however, the shovels are inserted into the ground and the strain becomesgreat the springs necessarily yield and adjust themselves in the directline of draft, and thus relieve the team.

It will be obvious that a rigid connection between the evener andcultivator-beams can never be adjusted to suit all the varyingcircumstances of the case. By the interposition of springs, however, itis believed that the evener will always adjust itself, when the strainis at all great, to the direct line of draft.

I do not claim broadly the employment of springs for easing the draft ofthe cultivator; but,

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

TnespriugsB B,with barb,when constructed specifically as described andemployed to connect the evener 0 directly to the beams A A of thecultivator, as described.

This specification signed and witnessed this 6th day of April, 1870.

NELSON S. SHIELDS.

Witnesses:

G. W. FORD, CHARLIE S. FORD.

